The trend for ionization energy is a general increase from left to right across a period. However, phosphorus (P) is found to have a higher first ionization energy value than sulfur (S). Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion.

Question

superhelp101 · Answer

@abb0t @adrynicoleb @anonymous_user @Awesome781 @sammixboo @stabar @iPwnBunnies

aaronq · Answer

write the electron configurations, note the differences between their arrangements of valence electrons.

superhelp101 · Answer

So you take the atomic mass of each element and multiply their corresponding subscript then add them all up.

Element                       Atomic Mass                         Subscript             Equation
Cu                                63.546                                    1                     63.546x1
N                                  14.00674                                2                     14.00674x2
O                                  15.994                                    6                     15.994x6

63.546+28.01348+95.964=187.5

And the unit is g/mol so the molar mass of Cu(NO3)2 is 187.5g/mol

aaronq · Answer

hm?

somy · Answer

oh dear thats not what you care about here

aaronq · Answer

This is sulfur|dw:1404769616076:dw|
This is phosphorous |dw:1404769682399:dw|